US3432509A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain quaternary n-propargyl pyridinium salts
Assignee: M&T Chemicals Inc
•
Filing: 1966-06-16
•
Granted: 1969-03-11
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Expires: 1986-06-16
Abstract
No abstract record available.
Inventors
- 👤 Frank Passal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:11
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/24; C07D213/44; C07D213/46; C07D213/50; C07D213/80; C07D213/81; C07D213/82; C25; C25D; C25D1/00; C25D3/00; C25D3/02; C25D3/12; C25D3/14; C25D3/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE1066068B
Cited
US3054733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |